Herbicidal composition

ABSTRACT

An N-arylphthalamate-dinitroalkyl phenolate herbicidal formulation is made stable in hard water by the addition of 2 to 20 percent by weight of a water soluble phenolic material.

United States Patent [191 Barron et a1.

[451 Feb. 19, 1974 HERBICIDAL COMPOSITION Inventors: Joseph E. Barron, Shelton; Adam Soboleski, Naugatuck, both of Conn.; William S. Mclntire, Senatobia, Miss.

Assignee: Uniroyal, Inc., New York, NY. Filed: May 7, 1971 App]. No.: 141,388

US. Cl 71/115, 71/122, 71/D1G. 1 Int. Cl A0ln 9/20 Field of Search 71/115, 122, DIG. 1

References Cited UNITED STATES PATENTS 2/1961 Entemann 260/395 X 3,108,927 10/1963 Pyne 167/31 OTHER PUBLICATIONS Maksimov et al7 Chem. Abst. Vol. 62 (1965) 1021c Zinsmeister et a1. Chem. Abst. Vol. 6 1965) 70430 Primary Examiner-Lewis Gotts Assistant Examiner-Catherine L. Mills Attorney, Agent, or Firm--Bert J. Lewen, Esq.

[5 7] ABSTRACT 5 Claims, No Drawings This invention relates to anew herbicidal composition which is particularly stable in the presence of hard water. More specifically, the invention relates to a herbicidal formulation containing an admixture of two herbicidally active materials, namely, salts of N-aryl phthalamic acid and dinitroalkylphenol, in admixture with a water-soluble phenolic, a surfactant, cyclohexanone and water.

The aforesaid herbicidally active materials have been described in the patent literature. See US. Patents 2,556,665 and 2,392,856. N-l-naphthylphathalarnic acid and 4,6-dinitro-o-sec. butylphenol are sold in combination and marketed under the name Dyanap (trademark of Uniroyal, Inc.). While Dyanap has achieved considerable commercial success, it however, has been found unstable when blended with water of an elevated hardness level.

it has now been discovered that this deficiency can be overcome by using the salts of both herbicides with a water soluble phenolic material, cyclohexanone and X FEQF: WM m t. wwwmww The Table sets forth the weight percent of the components in the formulations of the invention;

' TABLE Component Broad Preferred N -arylphthalamate 1-36 10-30 Dinitroalkyl phenolate 1-30 5-25 Phenolic material 1-20 2- l 5 Surfactant -10 0. l-l Cyclohexanone 1-16 7- l 4 Water 20-92 30-75 The N-aryl phthalamic acid salts have the following formula:

LOX

where is hydrogen, or an alkyl radical, e.g., methyl,

ethyl, n-propyl, isopropyl, n-butyl, isobutyl, secbutyl, amyl, hexyl, octyl. The aryl group may be a phenyl or naphthyl group, which may be substituted, as haloaryl, nitroaryl, alkylaryl, or hydroxyaryl, e.g., o-

,chlorophenyl, m-chlorophenyl, p-chlorophenyl, 2,4-

2,5-dichlorophenyl, 2-methyl-4-chlorophenyl,

dichlorophenyl,

trichlorophenyl, 2-

bromophenyl, 4-bromophenyl, 2,4,5-tribromophenyl, I o-nitrophenyl, m-nitrophenyl, p-nitrophenyl, 2-methyli 4-nitrophenyl,

2-chloro-4-nitro-phenyl, ohydroxyphenyl, m-hydroxyphenyl, p-hydroxyphenyl, 2-chloro-4-hydroxyphenyl, o-tolyl, m-tolyl, p-tolyl, p-

* tolyl, alpha-napththyl, beta-naphthyl. The X may be an (ethyleneoxy) ethanol.

wherein R is an alkyl radical containing from 3 to l0 carbon atoms, X is a alkali metal ion, and m is the valance of said ion.

Examples of these compounds are sodium 4,6- dinitro-o-normal-propyl-phenolate, sodium 4,6-dinitroo-normal-amyl-phenolate, sodium 4,6-dinitro-oisobutyl-phenolate, potassium 4,6-dinitro-o-tertiarybutyl-phenolate, ammonium 4,6-dinitro-o-isoamylphenolate. Others include sodium 4,6-dinitro-o-normal-butyl-phenolate, sodium 4,6-dinitro-o-tertiaryoctyl-phenolate, and potassium 4,6-dinitro-o-normalhexyl-phenolate.

The water soluble phenolic materials may be phenol or hydroxyl, lower alkyl or a carboxyl substituted derivfour additional substitutions on the ring. Preferably the l substitutions are l or 2 additional hydroxyl groups and- /or one lower alkyl or carboxyl group. Examples of the phenolic materials are phenol, resorcinol, catechol, hydroxyquinone, phloroglucinol, cresol and gallic acid.

Preferably a surfactant is used though the particular one is not critical. Preferred examples include the anionic-type such as tetrasodium ethylenediaminetetraacetate dihydrate and octylphenoxy poly Examples of other anionic surface-active agents are:

soaps (e.g., sodium laurate, ammonium stearate, diethanol ammonium oleate), alkylsulfonates (e.g., dodecyl sodium-sulfonate, cetyl potassium sulfonate), alkylsulfates (e.g., sodium dodecylsulfate, sodium oleyl sulfate), sulfonated ethers of long and short chain aliphatic groups (e.g., C, l-l -O-C H SO Na), sulfated ethers of long and short chain aliphatic groups (e.g., C, H,, OC H O-SO Na), sulfonated alkyl esters of long chain fatty acids sulfonated glycol esters of long chain fatty acids sulfonated alkyl substituted amides of long chain fatty acids 0 CHa fonnaldehyde condensation product (e.g., condensation product of formaldehyde and sodium naphthalene sulfonate).

N S S OaNa.

Non-ionic surface-active agents that may be used in the present growth regulant compositions are: polyether alcohols, such as reaction products of ethyleneoxide or polyethyleneglycol with a long chain fatty alcohol (e.g., reaction product of ethylene oxide and oleyl alcohol, viz: C H (OC H ),,OH where n is to 20; polyglycol esters, such as reaction products of ethylene oxide or polyethylene glycol with a long chain fatty acid (e.g. reaction product of ethylene oxide or polyethylene glycol with oleic acid, viz:

his;nfidaaogzha'ans? esters of polyhydric alcohols with long chain fatty acids (e.g., diethyleneglycol monolaurate, sorbitan trioleate).

Cationic surface-active agents that may be used in the present growth regulant compositions are: quaternary ammonium salts in which one of the groups attached to the nitrogen has an aliphatic group having at least 8 carbon atoms (e.g., trimethylcetyl ammoniumiodide, laurylpyridinium chloride, cetyldimethylbenzyl ammonium-chloride, N-stearylbetaine); and amines, amides, diamines and glyoxalidines having an aliphatic group containing at least 8 carbon atoms and their acid esters (e.g., stearyl amine hydrochloride, oleylamide, diethylethyleneoleyldiamine, Z-heptadecyl-N- hydroxyethylglyoxalidine).

As an example, the following procedure may be used to prepare the formulations of the invention:

1. Dissolve the sodium salt of N-lnaphthylphthalamic acid in water to give 1 to 2 pounds active ingredient per gallon in the final product.

2. Dissolve sodium hydroxide in this solution in the amount that will insure complete conversion of 4,6-dinitro-o-sec-butylphenol to the corresponding sodium salt.

3. Load the cyclohexanone to 8-10 percent by weight of total composition.

4. Load the 4,6-dinitro-o-sec-butylphenol which will give 1 to 2 pounds active ingredient per gallon in the final product.

5. Load the phenol, 2 to 10 percent by weight of total composition, Sequestrene ST (tetra sodium ethylenediaminetetraacetate dihydrate) and lgepal CA630 (octylphenoxypoly [ethyleneoxy] ethanol) and water.

6. Blend and package.

Dilution prior to application may be accomplished in any suitable vessel, preferably while agitating, by addition of the formulation to water usually at a ratio of one gallon of the formulation per 2 to 40 gallons of water.

For air applications, the preferred ratio is about one gallon of formulation per 4 to 6 gallons of water; ground applications usually call for a ratio of one gallon per 25 to 35 gallons of water. However, if so desired the EXAMPLE 1 This example compares the hard water stability of the formulation of the instant invention to the standard Dyanap formulation. The composition of the formulations are as follows:

TABLE A Material of Invention Gram Parts/ ml N-l-naphthyl dichloro 24.0

N- 1 -naphthylphthalamate in water TABLE A- C o rTtinued Material of Invention Gram Parts/100 ml 4,6-dinitro-o-sec-butylphenol (5% impurities) 7h 40% Cheelox NTA-l4 (40% aq. 5.70

sol. of nitrilotriacetic acid trisodium salt) 50% Caustic (Sodium 4.06

Hydroxide) Cyclohexanone 10.04

lgepal CA-630 0.24

Sequestrene ST 0.04

Water to 100 ml 1.35

Using synthetic hard water prepared from calcium chloride and magnesium sulfate, a 2000 ppm stock solution is prepared. By proper dilutions with distilled water various test waters are obtained. To prepare the test solutions, 94 ml of the various hard waters are placed in a cylinder graduate. To this, 6 ml of the herbicide concentrate is added. The graduate is stoppered and inverted several times to insure complete mixing. They are observed after 30 minutes of standing and evaluated for the degree of clarity. It has been found that within 30 minutes usually all the precipates will have formed with minimal settling thereof. The following results were obtained:

TABLE B Total water 0 300 500 1000 hardness (ppm) Formulation of clear clear SI. hazy hazy invention Dyanap clear clear opaque opaque-ppt.

Clearly, the formulation of the invention has superior hard water stability. I

EXAMPLE 2 their total hardness determined by the Taylor Total Water Hardness Method. This procedure, described by W. A. Taylor and Company, Baltimore 4, Maryland is as follows:

All equipment should be clean. Measure 50 ml sample and put into 200 ml flask. Hold back 5-l0 mls. Add 5 0.5 mls of hardness buffer to flask, mix. Add one dipper hardness dye indicator powder; mix to dissolve dye. lf

hardness is present mix should be red. Run in hardness reagent until color changes to blue. Add remaining water. lf color turns red, add hardness reagent until end product turns blue. Take burette reading of hardness;

reagent and multiply by if 50 mls of water is used; by 10 if 100 mls is used.

The following formulation of the invention is used:

This was packaged in one gallon units and sampled to various locations in the South and mid-West for actual field comparison with standard Dyanap. The results were as follows:

TABLE F SOYBEANS TABLE C Formulation B Gram PartsllOO ml 6 Quarts/Acre 94% Sodium 27.2 0 N- I -naphthyl-phthalamate Dyanap Uni-1053 97% 12.1 4!6 dinitramsecbmyhphenol Foxtatl Giant (Setarm Faberii, a. 270 290 Sodium hydroxide 95.5% 3.1 b 265 290 active) Phenol Pig Weed (Amaranthus rerroflexus :1 Cyclohexanone 10.0 L.) Water to 100 ml 58.8 2 0 275 c. 280 286 1 14.5 Cocklebur (Xanthium pensylvanicum a. 260 295 Wallr.) b. ND ND Contains the Sequestrene ST 0.24%. lgepal CA630 0.04%. c. 255 275 Morningglory (Ipomaea purpurea a. 279 289 Using the field. dilution of 6 ml herbicide to 40 ml of (L), b ND ND water sample, the following data were observed. c: 2 0 280 Buttonweed (Abutilon thephrast a. ND ND TABLE D Medic) b. 250 284 c. ND ND Test Water J. Stewarts L. Bundrick C. M. Careless Weed (Amaranlhus hybrid: a ND ND Airport Westdale, La. Hutchinson-Gin Cahagen, Rt. 4, Shreveport, La. 255 279 c. ND ND Total hardness 635 ppm 672 ppm 794 ppm Formulation B CLEAR CLEAR CLEAR Dyanap OPAQUE OPAQUE OPAQUE The hard water stability of instant invention compared to standard Dyanap is obviously superior.

EXAMPLE 3 The object of these data are to illustrate the weed control by using the instant invention vs standard Dyanap. The formulation was prepared in large volume and shown below as Formulation C. To obtain equivalent comparison the active ingredients were in equal proportion as used in Dyanap. One pound 4,6-dinitro-osec-butylphenol and two pounds N- l naphthylphthalamic acid active per gallon.

Ratings: 0 no weed control; 300 complete weed control; ND No data 40 Formulation C is superior for Sickle Pod Control.

EXAMPLE 4 The purpose is to demonstrate other ratios of active ingredients which may be prepared; however, equivalent Dyanap formulations at these ratios are not stable and cannot be prepared; therefore, comparative weed control or hard water tests are not possible.

These data show the winder range of weight ratios pos- 5 sible with regard to the active ingredients of N-arylphthalamates and dinitroalkylphenolates.

Having thus described our invention, what we claim and desire to protect by Letters Patent is:

1. In an improved agricultural formulation which comprises (A) l to 36 percent by weight of a compound having the formula:

where R is hydrogen or alkyl; aryl is substituted or unsubstituted N-phenyl or N-naphthyl wherein said substitutions are halo, nitro, alkyl or hydroxyl and X is an alkali metal, ammonia or an amine salt; (B) 1 to 30 percent by weight of an alkali metal salt of 4,6-dinitro-oalkyl phenol, wherein the alkyl group has 3 to carbon atoms; (C) l to 16 percent by weight of cyclohexanone; and (D) from 20 to 92 percent by weight of water, the improvement comprising the addition of 2 to 20 thalamate and component (B) is sodium 4,6-dinitro-osec-butylphenolate.

4. The agricultural formulation of claim 1 wherein the formulation contains a surfactant.

5. The agricultural formulation of claim 1 wherein the amount of (A) is 10 to 30 percent; of (B), 5 to 25 percent; of (C), 7 to 14 percent; of (D), 30 to percent; and of the water-soluble phenolic material, 2 to 15 percent. 

2. The agricultural formulation of claim 1 wherein the salts of the N-arylphthalamic acid and the 4,6-dinitro-o-alkylphenol are the sodium salt.
 3. The agricultural formulation of claim 1 wherein component (A) is sodium N-1-naphthyldichlorophthalamate and component (B) is sodium 4,6-dinitro-o-sec-butylphenolate.
 4. The agricultural formulation of claim 1 wherein the formulation contains a surfactant.
 5. The agricultural formulation of claim 1 wherein the amount of (A) is 10 to 30 percent; of (B), 5 to 25 percent; of (C), 7 to 14 percent; of (D), 30 to 75 percent; and of the water-soluble phenolic material, 2 to 15 percent. 